【#系統(tǒng)分析師考試# #2017年系統(tǒng)分析師考試沖刺模擬試題#】為了幫助廣大考生順利系統(tǒng)分析師考試,®無(wú)憂(yōu)考網(wǎng)整理了系統(tǒng)分析師考試沖刺模擬試題信息供大家參考,預(yù)祝大家順利取證!
設(shè)∫x0f(t2)=2x3,則∫10f(x)=(1)。
(1)
A.1
B.2
C.3
D.4
過(guò)原點(diǎn)做曲線(xiàn)y=ex的切線(xiàn),則切線(xiàn)的方程為(2)。
(2)
A.y=ex
B.y=ex
C.y=x
D.y=ex/2
lim(sin3x/tg2x)=(3)。
x→0
(3)
A.3
B.3/2
C.2
D.1
命題公式¬(P∨Q)←→(P∧Q)的合取范式為(4),析取范式為(5)。
(4)
A.(P∨Q)∧(¬P∨¬Q)
B.(P∨¬Q)∧(¬P∨¬Q)
C.(¬P∨Q)∧(P∨¬Q)
D.(P∨Q)∧(¬P∨Q)
(5)
A.(P∧Q)∨(¬P∧Q)
B.(¬P∧¬Q)∨(¬P∧Q)
C.(P∧¬Q)∨(¬P∧Q)
D.(P∧¬Q)∨(P∧Q)
In the following essay, each bland has four choices. Choose the best answer and write down on the answer sheet. With the implementation of (6) the so – called network has become a reality. The provision of such facilities is the most important part of the network requirements. However, in many applications the communicating computers may be of different types. This means that they may use different programming languages and, more importantly, different forms of (7) interface between user(application)program, normally referred to ,as application processes, and the underlying communication services may be (8). For example, one computer may be a small single-user computer, while another may be a large (9) system. In the earlier days of computer communication, these issues meant that only closed communities of computers (that is, from the same manufacturer) could communicate with each other in a meaningful way. IBM’s systems Network Architecture (SNA) and DEC’s Digital Network Architecture (DNA) are just two examples of communication software packages produced by manufacturers to allow their systems to be intercormected together. These proprietary packages, however, of which there am still many inexistence, do not address the problem of universal interconnect ability, or open systems interconnection. In an attempt to alleviate this problem,(10) ,in the late 1970s,formulated a reference model to provide a common basis (or the coordination of standards developments and to allow existing and evolving standards activities to be placed into perspective with one another.
(6)
A.communicationchannel
B.protocols
C.datachannel
D.publiccommunication
(7)
A.database
B.datarepresentation
C.protocols
D.datacommunication
(8)
A.same
B.similar
C.different
D.dependent
(9)
A.multi-user
B.client
C.server
D.full-user
(10)
A.DNA
B.SNA
C.theOSI
D.theISO
棧結(jié)構(gòu)不適用地下列(11)應(yīng)用
A.表達(dá)式求值
B.樹(shù)的層次序周游算法的實(shí)現(xiàn)
C.二叉樹(shù)對(duì)稱(chēng)序周游算法的實(shí)現(xiàn)
D.快速排序算法的實(shí)現(xiàn)
以下關(guān)于數(shù)據(jù)結(jié)構(gòu)的基本概念的敘述中(12)是錯(cuò)誤的。
A.數(shù)據(jù)元素是數(shù)據(jù)的基本單位
B.數(shù)據(jù)項(xiàng)是有獨(dú)立含義的數(shù)據(jù)小的單位
C.數(shù)據(jù)結(jié)構(gòu)概念包含的主要內(nèi)容是數(shù)據(jù)的邏輯結(jié)構(gòu)和數(shù)據(jù)的存儲(chǔ)結(jié)構(gòu)
D.數(shù)據(jù)的邏輯結(jié)構(gòu)分為線(xiàn)性結(jié)構(gòu)和非線(xiàn)性結(jié)構(gòu)
電視系統(tǒng)采用的顏色空間是,其亮度信號(hào)和色度信號(hào)是相分離的。下列顏色空間中,(13)顏色空間不屬于電視系統(tǒng)的顏色空間。
A.YUV
B.YIQ
C.YCrCb
D.HSL
在關(guān)系數(shù)據(jù)庫(kù)設(shè)計(jì)中,定義數(shù)據(jù)庫(kù)全局模式是(14)階段的內(nèi)容。
A.需求分析
B.概念設(shè)計(jì)
C.邏輯設(shè)計(jì)
D.物理設(shè)計(jì)
下列敘述中,正確的是(15)
A.用E—R圖只能表示實(shí)體集之間一對(duì)多的聯(lián)系
B.用E—R圖只能表示實(shí)體集之間一對(duì)一的聯(lián)系
C.用E—R圖表示的概念數(shù)據(jù)模型只能轉(zhuǎn)換為關(guān)系數(shù)據(jù)模型
D.用E—R圖能夠表示實(shí)體集之間一對(duì)一的聯(lián)系、一對(duì)多的聯(lián)系、多對(duì)多的聯(lián)系
基于“學(xué)生-選課-課程”數(shù)據(jù)庫(kù)中的三個(gè)關(guān)系:
S(S#,SNAME,SEX,AGE),SC(S#,C#,GRADE),C(C#,CNAME,TEACHER)
若要求查找選修“數(shù)據(jù)庫(kù)技術(shù)”這門(mén)課程的學(xué)生姓名和成績(jī),將使用關(guān)系(16)。
A.S和SC.
B.SC和C
C.S和C
D.S,SC和C
若要求查找姓名中第一個(gè)字為‘劉’的學(xué)生號(hào)和姓名。下面列出的SQL語(yǔ)句中,(17)是正確的。
A.SELECT S#,SNAME,F(xiàn)ROM S WHERE SNAME=‘劉%’
B.SELECT S#,SNAME,F(xiàn)ROM S WHERE SNAME=‘劉-’
C.SELECT S#,SNAME,F(xiàn)ROM S WHERE SNAME LIKE‘劉%’
D.SELECT S#,SNAME,F(xiàn)ROM S WHERE SNAME LIKE ‘劉-’
主機(jī)A運(yùn)行Unit操作系統(tǒng),IP地址為202.113.224.35,子網(wǎng)屏蔽碼為255.255.255.240。它們分別連接在同一臺(tái)局域交換機(jī)上,但處于不同的VLAN中。主機(jī)通過(guò)ping命令去ping主機(jī)B時(shí),發(fā)現(xiàn)接收不到正確的響應(yīng)?赡艿脑蚴(18)
A.主機(jī)A主機(jī)B的IP地址不同
B.主機(jī)A和主機(jī)B處于不同的VLAN中
C.主機(jī)A和主機(jī)B使用了不同操作系統(tǒng)
D.主機(jī)A和主機(jī)B處于不同的子網(wǎng)中
用戶(hù)A通過(guò)計(jì)算機(jī)網(wǎng)絡(luò)向用戶(hù)B發(fā)消息,表示自己同意簽訂某個(gè)合同,隨后用戶(hù)A反悔不承認(rèn)自己發(fā)過(guò)該條消息。為了防止這種情況發(fā)生,應(yīng)采用(19)
A.數(shù)字簽名技術(shù)
B.消息認(rèn)證技術(shù)
C.數(shù)據(jù)加密技術(shù)
D.身份認(rèn)證技術(shù)
下面選項(xiàng)中正確描述了沖突域的是(20)
A.傳送了沖突的數(shù)據(jù)包的網(wǎng)絡(luò)區(qū)域
B.以網(wǎng)橋、路由器、交換機(jī)為邊界的網(wǎng)絡(luò)區(qū)域
C.安裝了路由器和集線(xiàn)器的網(wǎng)絡(luò)區(qū)域
D.應(yīng)用了過(guò)濾器的網(wǎng)絡(luò)區(qū)域
參考答案:
1、C 公式d(∫x0f(t))/dx=f(x),所以f(x)=6x,∫10f(x)=∫106xdx=3x2|x0=3
2、B 本題中f(x)=exf’(x)=ex設(shè)所求切線(xiàn)方程為y-ex0=ex0(x-x0).由于切線(xiàn)過(guò)原點(diǎn),所以0-ex0=ex0(0-x0),解得x0=1,故所求切線(xiàn)方程為y-e=e(x-1)即y=ex
3、B
lim(sin3x/tg2x)=lim(sin3x/sin2x)cos2x=lim((sin3x/3x)/(sin2x/2x))(3/2)cos2x=(1/1)*(3/2)*1=3/2
x→0x→0
4、A
¬(P∨Q)←→(P∧Q)
ó(¬(P∨Q)→(P∧Q))∧((P∧Q)→¬(P∨Q))
ó((P∨Q)∨(P∧Q))∧((¬P∨¬Q)∨(¬P∧¬Q))
ó(P∨Q)∧(¬P∨¬Q)
5、C
利用∧對(duì)∨分配得
(P∨Q)∧(¬P∨¬Q)
ó(P∧¬P)∨(P∧¬Q)∨(¬P∧Q)∨(Q∧¬Q)
ó(P∧¬Q)∨(¬P∧Q)
6、B 此處Protocol表示協(xié)議的意思,由協(xié)議的出現(xiàn)才使得網(wǎng)絡(luò)的運(yùn)行成為一種可能性,所以選擇B
7、B 在此表示數(shù)據(jù)的表示形式不同因此選B
8、C 這里與上文對(duì)應(yīng),表示底層的不同通信設(shè)備由于協(xié)議的出現(xiàn)可以進(jìn)行相互的通信
9、A 與上文內(nèi)容對(duì)應(yīng),上文提及single-user,是指單用戶(hù),此處應(yīng)該是multi-user,多用戶(hù)的意思。
10、C OSI表示的是開(kāi)放式系統(tǒng)互聯(lián)參考模型,符合文中含義,所以只能選C